I think that you are missing something. Real madrid has been winning 1 trophy and that's FIFA club world cup. Real madrid is working on adding the second trophy from winning against barcelona in copa del rey. The chance for madrid to win copa del rey is far bigger compared with la liga. Real madrid faces difficulties in la liga due to the big points gap with barcelona. Real madrid's attacking line performance already declined. MU can beat barcelona easily while real madrid is always struggling against barcelona.
Ancelotti needs to do some rotations. Ancellotti's strategy is not working for barcelona anymore.
If you think Real Madrid's current form has dropped, then how do you really believe they can beat Barcelona at Camp Nou for the second leg?
You could say Real Madrid has a chance of qualifying for the Copa Del Rey final by beating Barcelona, but don't say it's an easy job. After all, there is no guarantee that Real Madrid can play their best players without injury, that's because the second leg will be played in April.
Manchester United didn't really easily beat Barcelona at Old Trafford, that's because Barcelona have good players to compete with any team. It's just that many people don't admit what the facts are because it's just Barcelona haters not football observers in general.